= Herbrand's theorem
{wiki=Herbrand's_theorem}
Herbrand's theorem is an important result in mathematical logic, particularly in the field of model theory and proof theory. It connects syntactic properties of first-order logic formulas to semantic properties of their models. There are several formulations of Herbrand's theorem, but one of the most common versions concerns the existence of models for a set of first-order logic sentences. \#\#\# Herbrand's Theorem (Informal Statement) 1.
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